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America's Favorite Hot Tub Supply
America's Favorite Hot Tub Supply

Genuine Balboa Expander (Daughter) Circuit Board 55137 for VS520 Series spa controls. 2 relay. 12 Amp Max. Also called G1920.
This Balboa® Expander printed circuit board (PCB) is mounted in addition to the main board in some VS520 hot tub control systems. Supports a 2-speed pump.
Product Notes: 12 Amp max load. Electrical or physical damage due to improper installation or incorrect PCB selection voids the manufacturer's warranty. PCBs cannot be returned or exchanged. 1-yr. factory limited warranty.
Associated Reference Numbers: 33-55137-K, 33-0029C-K, 55137, 56710, 59-355-1600, 59-355-1051, G1920.
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